TypeScript is like JavaScript but with superpowers. It's an open-source language developed by Microsoft that builds on JavaScript by adding static type definitions. This means you can catch errors and bugs before your code runs, making your applications more robust and easier to maintain. TypeScript can be used wherever JavaScript is used, but it adds the benefit of type safety and better tooling, which is a big win for larger projects. Imagine JavaScript, but with an extra layer of reliability and efficiency built in.